A clever person solves a problem. A wise person avoids it.
Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That’s relativity.
Life is like riding a bicycle. To keep your balance you must keep moving.
The world is a dangerous place to live, not because of the people who are evil, but because of the people who don’t do anything about it.
The secret to creativity is knowing how to hide your sources.
Computers are incredibly fast, accurate and stupid. Human beings are incredibly slow, inaccurate and brilliant. Together they are powerful beyond imagination.
Science without religion is lame, religion without science is blind.
I do not know with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
Reality is merely an illusion, albeit a very persistent one.
Anyone who has never made a mistake has never tried anything new.
The search for truth is more precious than its possession.
Wisdom is not a product of schooling but of the lifelong attempt to acquire it.
You cannot simultaneously prevent and prepare for war.